Like other people have noted, I have looked SO many times for a justified grid that has the kind of flexibility and customizability that JIG has. It was a little frustrating to deal with TimThumb errors at first, but the developer has anticipated most of the reasons it might not work quite out of the box, and I have to give them props for trying to help like that. It's quite a powerful plugin and anticipates a ton of different types of customization.

I particularly like that you can save presets with all your settings. Until I found JIG, the plugin I had been trying to work with was Envira Gallery, but there was no way to duplicate a gallery so all my settings could be saved. I knew I didn't want to jump through the same hoops a dozen times. So several plugins later, I finally found JIG and I freakin' love it. Just what I needed. The search is over. :)